Ryūgajō Nanana no Maizōkin

Nanana's Buried Treasure
First light novel volume cover featuring the character Nanana Ryūgajō
龍ヶ嬢七々々の埋蔵金
Genre	Adventure, Action, Supernatural, Comedy
Light novel
Written by	Kazuma Ōtorino
Illustrated by	Akaringo (vol. 1-7), Non (vol. 8-)
Published by	Enterbrain
Demographic	Male
Imprint	Famitsu Bunko
Original run	January 30, 2012 – present
Volumes	7
Manga
Written by	Kazuma Ōtorino
Illustrated by	Hitoshi Okuda
Published by	Enterbrain
Demographic	Shōnen
Magazine	Famitsu Comic Clear
Original run	January 2012 – present
Volumes	2
Light novel
Ikkyū Tensai no Kiwamete Fuhoni na Meisuiri
Written by	Kazuma Ōtorino
Illustrated by	Akaringo (vol. 1), Non (vol. 2-)
Published by	Enterbrain
Demographic	Male
Imprint	Famitsu Bunko
Original run	August 30, 2013 – present
Volumes	2
Anime television series
Directed by	Kanta Kamei
Written by	Hideyuki Kurata
Music by	Keigo Hoashi/MONACA
Studio	A-1 Pictures
Licensed by	AUS Madman Entertainment NA Aniplex of America
Original network	Fuji TV (Noitamina)
Original run	April 10, 2014 – June 19, 2014
Episodes	11 (List of episodes)

Nanana's Buried Treasure (龍ヶ嬢七々々の埋蔵金, Ryūgajō Nanana no Maizōkin^?, lit. "Nanana Ryūgajō's Buried Treasure") is a Japanese light novel series, written by Kazuma Ōtorino with art by Akaringo. Enterbrain has published seven volumes since January 2012 under their Famitsu Bunko imprint. A spin-off light novel series titled Ikkyū Tensai no Kiwamete Fuhon'i na Meisuiri (壱級天災の極めて不本意な名推理^?, lit. "Tensai Ikkyū's Reluctant Deduction") is also published under Famitsu Bunko, with the first volume released on August 30, 2013. A manga adaptation by Hitoshi Okuda began serialization in Enterbrain's Famitsu Comic Clear web magazine in January 2012. An anime television series adaptation by A-1 Pictures began airing from April 10, 2014 on Fuji TV's noitamina block.

In July 2014 Nozomi Ōsaka, under penname Non, replaces Akaringo as illustrator for the original light novel and its spin-off due to Akaringo's health condition. Akaringo stated that his health declined, and which is why the illustration for seventh volume could not be finished. Due to this, the decision was made to replace the illustrator in both projects.

On the "Special Student Zone" artificial island – Nanaejima, the story centers on a beautiful, optimistic, but NEET (not in education, employment or training) girl Nanana Ryūgajō, who was mysteriously killed in her own apartment.

Ten years later, a boy named Juugo Yama was forced to transfer to a high school on the island. With only a certain amount of money to live on, Juugo chooses a low-rent apartment that happens to be haunted by the ghostly Nanana, who is bound to her former home and unable to move on. Juugo and members of the school's adventure club join a "treasure hunt royale" on the island for the Nanana Collection, treasures that possess mysterious powers.